4102-53-8Relevant articles and documents
Immobilization of volatile and corrosive iodine monochloride (ICl) and I2 reagents in a stable metal-organic framework
He, Jun,Duan, Jingjing,Shi, Huatian,Huang, Jian,Huang, Jiahong,Yu, Lin,Zeller, Matthias,Hunter, Allen D.,Xu, Zhengtao
, p. 6837 - 6843 (2014)
The major discovery here is a robust and water-stable metal-organic framework (MOF) material capable of reversible binding of the volatile and reactive molecules of ICl and I2. The immobilization of I2 and ICl, as well as their controllable release thus achieved, is to facilitate the wide-ranging applications of these volatile species as catalysts and reagents in chemical and industrial processes. The framework material TMBP·CuI (hereafter TCuI) can be conveniently prepared in quantitative yields by heating CuI and the organic linker TMBP (3,3′,5,5′- tetramethyl-4,4′-bipyrazol) in acetonitrile. The microporous three-dimensional net of TCuI features CuI chains that contribute to efficient and reversible binding of ICl and I2 molecules, to result in the stoichiometrically well-defined adducts of TCuI·ICl and TCuI·I2, respectively. Moreover, the confinement of a volatile compound like ICl within the MOF medium provides unique opportunities to enhance its reactivity and selectivity as a chemical reagent, as is exemplified by the iodination reactions examined herein. With this exemplary study, we intend to stimulate interest in further exploring MOFs and other porous media (e.g., porous polymers) for entrapping ICl and other volatile reagents (e.g., Br2, SCl2, S2Cl2, and SOCl 2) and for potentially novel reactivity associated with the porous medium.
Imidazolinium-based Multiblock Amphiphile as Transmembrane Anion Transporter
Mori, Miki,Sato, Kohei,Ekimoto, Toru,Okumura, Shinichi,Ikeguchi, Mitsunori,Tabata, Kazuhito V.,Noji, Hiroyuki,Kinbara, Kazushi
, p. 147 - 157 (2020/12/11)
Transmembrane anion transport is an important biological process in maintaining cellular functions. Thus, synthetic anion transporters are widely developed for their biological applications. Imidazolinium was introduced as anion recognition site to a multiblock amphiphilic structure that consists of octa(ethylene glycol) and aromatic units. Ion transport assay using halide-sensitive lucigenin and pH-sensitive 8-hydroxypyrene-1,3,6-trisulfonate (HPTS) revealed that imidazolinium-based multiblock amphiphile (IMA) transports anions and showed high selectivity for nitrate, which plays crucial roles in many biological events. Temperature-dependent ion transport assay using 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) indicated that IMA works as a mobile carrier. 1H NMR titration experiments indicated that the C2 proton of the imidazolinium ring recognizes anions via a (C?H)+???X? hydrogen bond. Furthermore, all-atom molecular dynamics simulations revealed a dynamic feature of IMA within the membranes during ion transportation.
AN IMPROVED ONE POT, ONE STEP PROCESS FOR THE HALOGENATION OF AROMATICS USING SOLID ACID CATALYSTS
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Page/Page column 0047; 0048, (2019/04/18)
The present invention disclosed an improved one pot, one step process for halogenation of compound of formula (II) to afford corresponding halogenated compound of formula (I) having improved yield and increased selectivity under very mild conditions.
